H3-like DRAM controller needs some special code to operate a DDR2 DRAM
chip. Add the logic to probe such a chip.
As there's no commercial boards available now with H3 and DDR2 DRAM, the
patch is developed and tested on a V3s chip, which has in-package DDR2
DRAM.
Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Icenowy Zheng
0278d3db93